Updated 05/29/2011 – Removed Crazytown 1.3. Added Crazytown 1.4. Added MOBA 1.0. All mods current as of 1:00AM EST.
Another "cheat" accusation I have seen recenty. When my teammate uses oak (I can't use oak I'm useless) and does a spirit and minion build I've seen people RQ saying minion oak and minion ereb are 'cheating' and 'boring cheat'.
Well here's the thing with minion oak. Due to the way a minion build with oak can work, its actually quite easy to tear down a citadel with minions on several maps... this is due to the possible strength of the minions combined with oaks abilities, etc. On the most commonly played map, cataract, there aren't enough towers close enough to the citadel to defend against a spirit rush. So, unless you specifically choose a dg or 2 to counter a spirit rush at the start of the game, a minion oak going for a citadel rush is bound to succeed. The most annoying part of this sort of strategy is that anyone with just a little bit of talent could pull this off. So, the majority of experienced folks completely frown on spirit rushes on the citadel. It doesn't prove anything or any real level of skill with oak... just that you know how to stay out of a battle and farm creeps. That's not to say it can't be countered, but if your team has no dgs with AOE attacks, odds are you can't stop it (with the exception of erebus - the only dg with minions that can attack spirit wards).
Odds are that spirit oak could be countered by any dg to some degree if it was possible to attack spirit wards (and if the folks on your team were smart enough to attack the wards as a priority).
That said, a lot of folks jump the gun completely and just start to complain if they see spirits used. I already covered the cheese method of just spamming the citadel on cataract with spirits. That, imo, is the only reason to bitch about minion oaks being used. And even then, you can counter it if you are expecting it. Its still possible to go minion oak and not be a jerk though. It's generally acceptable to use a minion or hybrid oak and just not use the citadel spam. Most of the experienced folks don't go the cheese cit spam anyway. So - like I said - its really just an issue of some folks assuming that someones just going to spam the citadel (which is no fun for anyone but the jackass thinking himself impressive doing it). But not everyone plays this way.
re: minion erb - I don't think that's anywhere near the threat it once was. If I remember right, it was mostly possible because of the way the horn of battle worked before it was nerfed. That said - the last time I saw a minion erb take out a cit was about a year and a half ago.... that I'm probably right.